package com.fulu.netty.discardserver;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
/**
 * 丢弃任何进入的数据 启动服务端的DiscardServerHandler
 */
public class DiscardServer {
    private int port;

    public DiscardServer(int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {

        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        System.out.println("准备运行接口：" + port);

        try {
            ServerBootstrap b = new ServerBootstrap();

            b.group(bossGroup, workerGroup);

            b.channel(NioServerSocketChannel.class);

            b.childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel socketChannel) throws Exception {
                    socketChannel.pipeline().addLast(new DiscardServerHandler());
                }
            });

            b.option(ChannelOption.SO_BACKLOG, 128);

            b.childOption(ChannelOption.SO_KEEPALIVE, true);

            ChannelFuture channelFuture = b.bind(port).sync();

            channelFuture.channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }

    }

    public static void main(String[] args) throws InterruptedException {
        int port;
        if(args.length > 0){
            port = Integer.parseInt(args[0]);
        }else{
            port = 8080;
        }
        new DiscardServer(port).run();
        System.out.println("server:run()");
    }
}
